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vfio: warn if host device rom can't be read 

If the device rom can't be read, report an error to the
user. This alerts the user that the device has a bad
state that is causing rom read failure or option rom
loading has been disabled from the device boot menu
(among other reasons).

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
This commit is contained in:
Bandan Das 2014-01-15 10:11:06 -07:00 committed by Alex Williamson
parent 7c4228b477
commit d20b43dfea
1 changed files with 7 additions and 0 deletions
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7
hw/misc/vfio.c
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@ -1125,6 +1125,13 @@ static void vfio_pci_load_rom(VFIODevice *vdev)
vdev->rom_offset = reg_info.offset;
if (!vdev->rom_size) {
error_report("vfio-pci: Cannot read device rom at "
"%04x:%02x:%02x.%x\n",
vdev->host.domain, vdev->host.bus, vdev->host.slot,
vdev->host.function);
error_printf("Device option ROM contents are probably invalid "
"(check dmesg).\nSkip option ROM probe with rombar=0, "
"or load from file with romfile=\n");
return;
}